LM5009A

Product Folder Sample & Buy Technical Documents Tools & Software Support & Community LM5009A SNVS608H – JUNE 2009 – REVISED SEPTEMBER 2016 LM5009A 100-V, 150-mA Constant ON-Time Buck Switching Regulator 1 Features 1 Operating Input Voltage Range: 6 V to 95 V Integrated 100-V, N-Channel Buck Switch Internal Start-Up Regulator No Loop Compensation Required Ultra-Fast Transient Response ON Time Varies Inversely With Input Voltage Operating Frequency Remains Constant With Varying Line Voltage and Load Current Adjustable Output Voltage From 2.5 V Highly Efficient Operation Precision Internal Reference Low Bias Current Intelligent Current Limit Thermal Shutdown 8-Pin VSSOP and 8-Pin WSON (4 mm × 4 mm) Packages 2 Applications Non-Isolated Telecommunication Buck Regulator Secondary High-Voltage Post Regulator 42-V Automotive Systems 3 Description The LM5009A is a functional variant of the LM5009 COT buck switching regulator. The functional differences of the LM5009A are: The minimum input operating voltage is 6 V, the ON-time equation is slightly different, and the requirement for a minimum load current is removed. The LM5009A step-down switching regulator features all of the functions required to implement a low cost, efficient, buck bias regulator. This high voltage regulator contains an 100-V N-channel buck switch. The device is easy to implement and is provided in the 8-pin VSSOP and the thermally enhanced 8-pin WSON packages. The regulator...